Telephone.



J. 0. CADlEU-X.

TELEPHONE.

APPLxcATloN min JULY 22.1915.

Patented May 2, 1916.

2 SHEES-SHEETZ.

iii si i Mimi Applcsaitmi iled uly 22, m15. Ecija) Nc.

To aZZ 'wimmmriy amicem:

' E@ itl known that JOSEYH fimisux, a citizen of the United. States; ofAmerie@ residing :it Meriden, NGW Haven county, State of Connecticu,havia invented a, mw and useful Telephone., ui' Whisk iii@ ioiiowif-jing is :i spciiczitiou.

This invention. i'eiafbes pafticuifiicly when, :ire known apai'imem;buns@ vasi bui@ teipiioneu.

lisirticuimf @bissig 0i the invention we mummia and. diminuta caitiiinc'iisfivm" iiiu'eiveii'or@ ign-umili in cia'vicas Si. 'ziiiraciiaimctai, and to provid@ u, teipiwne of ezxii'meiy siitfipie,iuexpeusiv@ sind 'tical censiiuciion.

@ne finzi-mf@ 0i ih@ invention amuiifiiiigiy consists im' mounting timtmnsmitiiiig .amai receiving eieuumts 011 the back 0i? :i :fe-,sii plateand iii Cummunimicu with Lippi@ priuteiy 'placed transmitting andrecii/iig openings .iu ysuch face "plate,- This dnas away with the usualprojecting mout-h piea, sepsiiate iceiver .find corda ish@ Sensiiii'@puits oi he instrument are whoiiy proteciii by the' im@ platev :imi theim@ piziii c@ inutil-ei ieaiure is iii@ mmmtiugf; olif caii ings'wiaiies un iii@ bwk iii@ fait@ pia@ and providing; them 'withopemiiiig tons wposeii the fi'nt of h@ im@ pint@ for sei-ectiveij/Caliing this diiieuen; Siri in.ents

The accompanying fiiawiugs iliusiufae tim invention miioiiiefi in apractical idoim, 'but it will be understood thai, vmious ciiazitigs undmofiiicaions may bu made without ii@- pa'i'iing from the trufa scopa'imi spirit of the iinvmitiom Figure l is :i front or face View @ii :i1911011@ set embodying; tifa invii/miam is rear View ci' thefsum@ iii@pmiecfiiw casing @mi the' megapiiom of die remiifif being;T Shown insectifm; Fig. 3 is a veiticafi scctionzii. viewnii: the insgrurfieiitmimi sub-- stantiaiiy' mi the `piane, Of iiii@ iii-3 0i Fig, L Fig. i isa cross saciicnzii 'View 0i2 ha Stimm tiikiaii Gubsimiziaiijv on mepian@ of the 1in@ ,4.-4 oil? Fig. i. 5 a im grammatic iipieseumtioii ofghe iiustiumeiiiz and ai iaypicui wiring pian for ih@ same.

Tim face. plate which wristtuie@ iii@ main body and. support igor ibiivarious'instiuiizin aiiiius is designated. $.01. This muy be andpreferably a. piaiii Hush pieu@ @it siiuei; met-ii which may," besii'iw'' und mici@ Mid., ami. a. i be aim.....aly' i to fiii o* bisSuppo-i wd i 1' bar and the third terminal 42 being as indicated in Fig.i electrically connected tothe bus bar by its securing screws 43. Asheet of insulation 44 may be placed between the terminals and thecalling switches beneath the same to prevent the binding Screws 45 ofthe terminals from accidentally making contact with any of the callingswitches.

The wiring on the back of the face plate is illustrated in Figs. 2 andv3, where 50 indicates the connection from the transmitter to oneterminal of the receiver, 51 indicates another connection from the otherterminalx of the iieceiver to the line terminal 40, and 52 indicates aconnection from the other terminal of the transmitter to the lineterminal 4,1. t

The parts are all properly insulated, and as an additional safeguard, asheet of insulation 55 preferably extends the full length on the back oftheface plate. This forms an insulating base for all the parts on theback of the face plate, and it may be conveniently secured in place bymeans of eyelets 56 inserted through the push button openings andserving as guides for the push buttons. y

To protect the parts from dust, etc., 'a boX or casing 60 is preferablyprovided inclosing all the parts on the back of the face plate .andconveniently secured in place by screws G1 engaged with the face plate.This casing may be provided with a suitable opening or openings G2 forthe various exterior circuit Wires.

In installing the instrument the terminal 40 (marked T) is connectedwitha line wire extending to the telephone sets of the different apartments,as indicated in Fig. 5. The terminal 41 (marked B) is connected with atalking battery and by a line 71 with the other terminalsy of thedifferent apartment telephone sets. The terminal 4t2 (marked R) iSconnected with a ringing battery 72, which in turn is connected with theline wire 71. The bell of the telephone set in apartment number l isconnected by conductor 73 with the terminal of the nurnbcr 1 callingswitch on the back of the face plate and the call bell of the telephoneSet in apartment number 2 is similarly con nected by conductor 74: withthe number 2 calling switch 011 the back of the face plate. Inoperation, it will be evident that upon the pressure ot the number 1button, ringing currentl will be sent from battery 72 through the busbar, the number 1 calling switch, conductor 73, the bell T5 and receiverswitch 76 of the number 1 apartment set and back through conductor Tl tothe other side of the battery. lifted off the hook at the number lapartnient, the talking circuit will be completed and conversation canthen be carried on between the vestibule telephone set and the number 1apartment set. In this case the circuit will be from talking battery 70through the transmitter and receiver of the vestibule set and by way ofconductor 65 to the receiver 77 and transmitter 78 of the number 1apartment, and by way of the common return 71 back `to the other side ofthe battery. The circuits for the number 2 apartment and as manyotherapartlnents as there may be, will be similar to those de scribed.Ias will be readily understood.

From the foregoing, it will be seen that the telephone set constructedin accordance with my invention, is extremely simple and practical, andbeing devoid of projecting and exposed or separate parts, is extremely`well suited to use in apartment house vestibules. where great loss hasheretofore been occasioned b v the breakage and theft of the When thereceiver is exposed portions of the usual telephone set.

lVhat l claim is:

1. A flush telephone set comprising a. face plate provided withtransmitting and receiving openings, a non-protruding transmittersecured to the back of said face plate in communication with thetransmitting opening therein, a bus bar mounted on the back of said faceplate, a plurality of calling buttons mounted on the face plateelectrically connected with said bus bar and operable at the front ofthe face plate and a'non-protruding receiver secured to the back of theface plate and provided with a tllroat piece communicating with thereceivi'ngopening in the face plate whereby said parts are protected bythe face plate and said face plate forms a ush face piece for thetransmitter and receiver devoid of projecting telephone parts.

2. A flush telephone set comprising a face plate provided with atransmitting opening surrounded 'by a rearwardly projecting bushing, atransmitter engaged with and supported on said bushing, a receiver provided with a megaphone throat piece and means detachably securing saidthroat piece to the back of the. face plate, said face plate having areceiving opening therein in line with said throat piece.

3. A flush telephone set comprising a face plate provided with atransmitting opening and with a substantially annular receiving opening,a receiver provided with a megaphone throat piece surrounding andinclosmeneer in seid annuler receiving opening, a conice delector Withinthe throat piece with its heise inside the inner periphery of theennular receiving opening, and :i transmitter at the beck of the faceplate in communication with the aforesaid transmitting opening.

4. A ilush telephone set comprising a. fece plate providedwith atransmitting opening and with e substantially annular receiving opening,:i receiver provided with a. megaphone throet piece surrounding andinclosing said annuler receiving opening and et conical deleetor Withinthe thront piece with its base inside the inner periphery of the annularreceiving opening.

5. A Hush. ltelephone set comprising u face plate provided with a.transmitting opening e receiivirw opening and `push button oper ings, eismitter supported on the beck of said ieee plate 'with its mouth incommunicution wi'ththe transmitting opening,

n receiver supported on the back of the face plate provided with athroat piece in communication with the receiving opening and callingswitches supported :on the back of the fece plate provided withoperating louttons projecting forwardly through the push button openingsin the face plete.

6. A. flush telephone set comprising e face plete provided with atransmitting opening, e receiving opening and a series of push buttonopenings, e transmitter secured to the back of sind face plete with themouth thereof in communication with the trans- -mitting opening, areceiver secured to the :termina-ls supported on the bus bar in thepleine of the contact fingers but insulated therefrom, and push buttonsseated in the push button openings in the face plate and engaging thelaterally projecting contact lingers for forcing said fingers intoengagement With the line terminals.

JOSEPH O. CADIEUX.

